update for beta 8
updates for beta 8 and revisions.txt location
adding a blank pshader tutorial for @codeanticode
commented out js entries in XMLs
commented out js switch on reference index pages
Merge pull request #47 from fjenett/master

Removal of JavaScript mode from reference (generator / pages)
added js mode to contributions
Merge pull request #51 from fjenett/master

Added JS mode to contributions file
Added exception handling for UTF-8 decoding errors.
Updated list of contributions.
First edits of pshader tutorial
added images folder for shader tutorial
added link to github repo with intro examples